Hello!
As for inspirations, there aren't from one place in particular but a plethora of them. I did a bunch of research watching some of the classic gothic movies, as well as reading the most well known TTRPG products to take inspiration from. The Netflix's Castlevania show was where I got a lot of inspiration from, as well as monster character designs from Souls-like videogames (even if I have not played that many of them). It was important for me to nail the gothic style that these all present, and give enough content for people to create their own tragic gothic horror stories. I hope you are having a good time going through the pages!
I appreciate your corrections and will be taking a look at them when I get the time for it :D